Mold.



E. E. EVEBETT.

MOLD.

APPucATmN FILED APR. 24. :916.

Patented July 2, 1918.

` l'inrrrirns'rnTias PnTENroFFIcn EDWARD n. nvnnnr'r, or-rmLADLrHiA, rENNsYLvANrn, AssIcNo .ro .rHILADELf yIPI-IIA. STORAGE 'BATTERY COMPANY, 0F PHILADELPHIA, :PENN,SYIiVAN-A,,y 'AQ-COR@ rortA'rIoN or PENNSYLVANIA. MOLD. l 1,271,29 specification of Letters raient. Patented July 2, 1918.Y

Application led April 24, 1916. Serial No. 93,192.V

To all lwhom it may concern:

Be it known that I, EDWARD E. EVERETT, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented Molds, of which the following is a speciication.

One object of my invention is tok so construct a mold, particularly of the type designed for casting storage battery grids, that it will eectively let out the air when the molten metal is poured into it, but shall prevent the escape of anyA of said metal..

This object and other advantageous ends I secure as hereinafter set forth, reference being had to the accompanying drawings,

in which:

Figure 1 is a transverse section of a mold constructed according to my invention; and

Fig. 2 is plan of one of the sections of the mold shown in Fig. 1.

In the above drawings l and 2 represent two relatively heavy metal plates or blocks constituting the two sections of a mold and positioned relatively toeach other by pins 3 mounted on one section and extending into suitable recesses in the other. The abutting faces of said sections have formed in them cavities of the shape of the casting to be made and these are in communication with an inlet chamber 4 into which the molten metal is poured.

In the case of the mold illustrated, the recesses in each mold section forming the entrance chamber have connected to them 85 grooves 5 and 6 which in turn are connected by other grooves 7 and 8 at right angles to them, which with said first grooves are intended for the reception of metal constituting the marginal portions of the grid. The 40 groove 6 has an extension 9 for the reception of metal designed to serve as the terminal of the grid and the grooves 5- and 6 are connected by smaller inclined grooves 10 so that the plate cast in the mold illustrated is of the so-called herring bone construction.

Obviously other grooves similar to those shown in Fig. 2 are formed in that face of the section 2 of the mold which abuts upon the grooved face of the section l and in either one of these sections (in the case illustrated that indicated at 2) there are formed a series of holes 0r passages 11 lead-k ing from its external face inwardly and opening on those portions of its flat inner face which abut and practically cont-act with similar plane faces of the other mold section immediately adjacent the grooves but without communicating with any of the same in either section. It is noted that the passages 1l are tapered or have their outer ends of larger diameter than that of their inner ends, so that if through incomplete closure of the mold, metal should enter and harden in them, it could be easily removed.

lVith this arrangement of parts when the mold sections have been fastened together, and usually heated, the molten metal is delivered to the inlet chamber 4 from which it freely Hows to the various grooves. These are filled with air, which unless allowed to escape, would impede the flow of the metal and cause imperfect castings, and the molten metal forces it out through the relatively thin spaces between the abutting faces 'of the mold sections into the'passages 11 which open on said faces. These spaces between the mold sections, while permitting the rapid discharge of air from the grooves, are of such minute thickness as to absolutely prevent the entrance of said metal from said grooves and the terminal chamber 9. The metal is thus permitted to quickly reach and lill all spaces in the mold which are in communication with the entrance chamber t, but is effectually prevented from trapping any of the air in the mold and the consequent formation of imperfect frame orv lattice-work members in the finished grid.

Obviously it is immaterial whether both or but one or more than two mold sections are formed with metal receiving cavities, since the vital feature of my invention resides in the provision of air vents leading to or opening upon one face of a mold section which abuts upon another face adjacent a metal receiving cavity so 'as to allowy escape of the air through the minute spaces between said contacting faces without possibility of permitting flow of metal therethrough.

I claim A mold made in sections having Hat con- 105 tacting faces and provided with cavities in the fornil of grooves defining closed figures, substantially engaging' the rst sect-ion, proat'least! one of said vseotions laeing provided Vide with it relatively! thin lpassages whose with air Vents opening' on portions of the dimensions are insufiicient to allow of iow flat inner face thereof oircumscribed by ltlie of metal but which allow escape of air from 10 5 grooves and abutting against Hat portions the mold cavities. 7

of `vanothersection,` vwhich portions while l EDWARD E- EVERETT- Copies of this patent may be obtained for five ce'nts each, by addressing the Commissioner of Patents,

Washington, D. C. 

